byte version of ronalds d207 ssse3 optimizations
(commit: f891f84d3ba9345b0074e682f0fea09b8ddf4f1e)

Change-Id: If15f71a589ea16f78ac86a501b0c5c6231dc9af1

Change-Id: Ifef756a3a91423bb9f5411f06fa092027be21ecf

Renames:
  fdct4_1d   -> fdct4
  fadst4_1d  -> fadst4
  fdct8_1d   -> fdct8
  fadst8_1d  -> fadst8
  fdct16_1d  -> fdct16
  fadst16_1d -> fadst16

"_1d" suffix is redundant, so removing it. The same will happen with idct
in the next change sets.

Change-Id: Ibf421cd2f569146c6079269df7a31819c098265e

Renames:
  vp9_short_idct32x32_add   -> vp9_idct32x32_1024_add
  vp9_short_idct32x32_1_add -> vp9_idct32x32_1_add
  vp9_idct_add_32x32        -> vp9_idct32x32_add

Change-Id: Id85306f5814bac6c47463a6b5901a93082510666

This commit re-designs the per transformed block rate-distortion
costs tracking buffers. It removes redundant buffer usage, makes
the needed context memory allocation per VP9_COMP instance and
reuses the same buffer sets inside the rate-distortion optimization
search loop, thereby avoiding repeatedly requiring memory space.

It reduces speed 0 runtime:

bus at 2000 kbps from 166763ms to 158967ms,
football at 600 kbps from 246614ms to 234257ms.

Both about 5% speed-up. Local tests suggest about 2% to 5% speed-up
for speed 1 and 2 settings. This does not change compression
performance.

Change-Id: I363514c5276b5cf9a38c7251088ffc6ab7f9a4c3

Change-Id: Id5e31833a0ef40de9f64c2f5674af7083233bf14

Increases these parameters.
There is a small efficiency gain.

Change-Id: Ie5f0ddb39c907d335e0dafa5eb112365a81f4542
derfraw300: +0.091%
stdhdraw250: +0.238%

Change-Id: I7231589bda71d0d23c730283febd5bb58585a0da

The intra mode distortion adjustment for skip_encode feature was
broken in the refactoring cc91851. This commit fixes it and tunes
the distortion models used therein.

Change-Id: I0d676e82f8e855536a90cf9b3e3fdefafcd886c6

snprintf is not supported by MSVC, the commit replace it with the msvc
variant _snprintf to enable build.

Change-Id: I686943a78c289bae6b486a5e75effad5f86c24de

Some minor cleanups in preparation for experimentation with
some encode parameters and thresholds

Change-Id: I449d66da97eae0a7acdf4aae374e2f9111342056

Use b_mode_info to store the inter prediction mode of sub8x8 block,
in replacement of the use of partition_info. Remove redundant buffer
update for partition_info. For bus_cif at 2000 kbps, this seem to make
speed 0 about 1% faster.

Change-Id: Id1b3be45e75a24fb4b42335ac480c23e440978f6

Change-Id: Ic31b4ef85e65070b4f8b9f26e068ccfaae00c4f0

Change-Id: Id1fde9920d60c6991a8ef6de5103ae3e578312ed

When all coefficients are zeros, skip the corresponding 1-D inverse
transform. This practice has been used in the SSE2 implementation of
inverse 32x32 DCT. This commit imports this algorithm into the C code.

Change-Id: I0f58bfcb183a569fab85d524d5d9cf8ae8653f86

We already have itxm_add member in MACROBLOCKD structure. Both
inv_txm4x4_1_add and inv_txm4x4_add are just its special cases for
different eob values. But eob logic is already implemented in
vp9_iwht4x4_add and vp9_idct4x4_add (that's why also removing
inverse_transform_b_4x4_add).

Change-Id: I80bec9b6f7d40c5e5033c613faca5c819c3e6326

For CpuUsed 1 & 2, this commit allow to skip retangular partition check
when NONE is better than SPLIT. It also changed to allow such logic
on alt ref frame coding rather than use square partition all them. The
change has gain compressio about .3% on yt and ythd for both 1&2, It
helped .6% compression on cif and stdhd for both CpuUsed 1&2.

Change-Id: I814b653baf89f59acd20e042629a12938a1bd4e5